I did more research on the topic.
Found out that there is a bug in nvidia driver (missing EDID)!
Here is how to fix it: http://files.bortweb.com/how_to_fix_nvidia_blurry_fuzzy_screen_or_text.htm
Works for win 7 if you adapt some things.
nv_disp.inf is located in C:\NVIDIA\DisplayDriver\306.23\Win8_WinVista_Win7_64\English\Display.Driver\
The appearance of the installer has changed so after clicking "agree" cancel the installer.
Now every thing works!!!!!!!!!!!!!1111oneone eleven
Note, don't buy a 600 series gfx card if you are a designer, poor performance for double cash (stupid to hope that nvidia will release better soft to increase the performance, cuda support is broken, JUST DON'T BUY IT). If you are just a gamer then buy a 690.